Create documentation on Supported Content types on developer.yoast.com

[hdvos]

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This task was created as part of this task: https://github.com/Yoast/non-dev-tasks/issues/39
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Blocked by #226 because links need to created to pages that are created in that task.

Supported Content types

In developer/docs/features/analysis create a folder called content-types.

overview.md

Within this folder we create one overview.md with some general information about supported content types and links to all specific docs in docusaurus.

The overview should have a docusaurus header like such:

---
id: contentTypeOverview
title: "Content Types: Overview"
sidebar_label: overview
description: This documentation provides an overview of the different content types we support.
---

List of content types:

• Post/Page/CPT
• taxonomy
• product/Shopify Product
• ...

content type specific pages.

---
id: postPageCPT
title: "Content Types: Post/Page/CPT"
sidebar_label: Post/Page/CPT
description: This documentation provides information on what assessments are available for Posts/Pages/CPTs and how they are available.
---

This could contain a table of all Assessments (with hyperlink to their docusaurus page that was created in #226) and some additional information

Assessment	Content type Specific config
Keyphrase in introduction	❌
Keyphrase length	❌
...	...

Think about whether other columns might be applicable to the table.